Arch construction.



No. 773,149. PATENTED CCT. 25., 1904. G. L. JUNGE.

ARCH CONSTRUCTION.

APPLICATION FILED MAY 11, 1904.

N0 MODEL.

/N VEN TOR,

Gaatgshwus umg,

A TTOHNE Y UNTTED STATES Patented October 25, 1904.

PATENT OFFICE.

ARCH CONSTRUCTION.

SPECIFICATION forming part of Letters PatentNo. 773,149, dated October25, 1904.

Application iled May 11, 1904. Serial No. 207,376. (No model.)

To all whom t mag/concern.-

Be it known that I, GEORGE L. JUNGE, a citizen of the United States,residing at the .city of Pittsburg, in the county of Allegheny and Stateof Pennsylvania, have invented orI discovered new and usefulImprovements in Arch Construction, of which the following is aspecification.

In the accompanying drawings, Figure 1 1s a cross-sectional View of aboiler-furnace along the line I I in Fig. 2. Fig. 2 is a detail 'view insection along the line II II in Fig. 1. Fig.

3 is an enlarged broken front elevation of my archconstruction, and Fig.4. is a front View of my. improved skewback. s

My invention consists of certain new and useful improvements in archconstruction, and is especially applicable to baiIle-wall constructionfor furnaces, although its adaptability in any character of archwork isevident.

It consists, briefly, of supporting members reaching from side wall toside wall and having suspendedtherefrom secondary supporting members,from which a protecting-facing of a refractory material may besuspended.

I have described my invention as more particularly applied to archedwork, but its use in constructing a at as well as a convex arch isevident, and I wish to include the same within the purview of thisapplication.

In the accompanying drawings, which are merelyr illustrative of theprinciples of my invention and not intended as limiting the same, 1 1are the side walls of afurnace, 2 a boiler supported by said furnace inthe usual manner, and 3 is the baffle-wall extending in the usual mannerfrom side wall to side wall and preferably built up around the peripheryof the boiler 2. Said bafiie-wall is supported by my novel archconstruction.

4 t are the grate-bars of anyusualdesign.

5 5 are inverted T-i'rons, which are sprung across from side Wall toside wall and in case of a convex arch having the desired curvature. Theextremities of T-irons 5 5 are secured in and held firmly in placebyskewbacks 6 6, which have recessed seats 7 7 in their frontsl of theproper contour to receive the extremities of T-irons 5 5. .Said

skewbacks are preferably metal castings of proper shape to beconveniently and rigidly built into the side walls of the furnace andmay be of hollow construction,` as shown in section in Fig. 1. VThebaffle-wall 3 is built up, as shown, above the inverted T-irons 5 5 ofany suitable refractory material. 8 8 are sections of I-beams having topanges 9 9, which are cut away somewhat on their lower faces to formshoulders 10 10. The lower flanges 11 11 are preferably somewhat widerthan the top fianges 9 9 and are provided at their edges withupwardly-extending lips 12 12. The said I-beams are inserted between theinside flanges of the T-irons 5 5 by tipping, as indicated in dottedlines in Fig. 2, and the shoulders 10 10 serve to prevent theirdisplacement by lateral movement. The I- beams are made in lengthsconvenient to handle and are curved longitudinally to, conform to thecurvature of the T-irons.

13.13 are tile or brick of suitable refractory material and of thedesign illustrated in Fig. 2. They are provided with L-shaped recesses14. 14 to engage the flanges 1l 11 and lips 12 12 of the I-beams 8 8,which recesses are, however, lsomewhat larger than the iiange and lip toenter the same, thusallowing a tile to be suspended from each iiange 11of an vI-bearn section by inserting the tile in place from the somewhatelevated position shown in dotted lines in Fig. 2. The upper portion ofthe tile is of a somewhat less width than the lower portion to allow forthe vertical web of the I-beam and expansion of the parts, this latterbeing an additional benet desired from the enlargement of the recessesin the tile.

To assemble the arch, I suspenda suflcient number of I-beam sectionsfrom the T-irons, as shown, to extend from side to side of the arch vandwhere, as shown in the drawings, the I-beam sections and tile are of thesame length I break joints between I-beams and tile by making the endsections 8ft 8 of the I-beams of half the usual length, thus forming akey I-beam 81 in the center of the arch, beneath the center of whichwill come the joint between two tile. The tile are now slid into placeon each side of the I-beams. The

space 15 between the lower faces of the T- irons and the lower faces offlanges 9 9 of the I-beams may be filled with 'a packing of asbestos andclay, which will allow for eX- pansion and contraction of the variousmembers of the construction. Alike filling may, if desired, be placed inspace 16 just above. Fire-brick 17 are then built in between the top ofthe outer flanges of the T-,irons and the bottom of the baille-wall 3,said space being preferably of proper heighth to accommodate a brick seton edge. Similar fire-brick 18 are built up from the top of the tile tothe opposing bottom ofthe baffle-wall.

It is evident that by knocking out the brick.

work 18 any desired tile may be removed at will forrepairs orreplacement, and by removing the tile suspended therefrom and knockingout the bricks 17 on both sides any desired section of I-beams may beremoved at pleasure. It is thus evident that my arch construction may berenewed at any time. The space 19 below the lower flanges of the I-beamsis preferably left vacant and may be connected with the open air at theoutside of the boiler' by means of apertures 2O 20 through the sidewalls 1 1 for the sake of coolness.

I may vary my construction in many ways without departing from theprinciple thereof-as, for instance, substituting inverted angle-ironswith inwardly-extending flanges for the T-irons -which practicallyamounts to omitting the outside flanges of the T-irons and using a brickfilling 18 instead of the single brick 17.

Although I have shown my invention particularly applied to furnace-work,it is applicable to all forms of flat or convex arch constructions, andby constructing adjacent or abutting arches of any number and contour Ivery easily construct an arch of any desired length and width.

Although I have for the sake of clearness minutely described theconstruction illus-l trated in the drawings, I do not wish to limitmyself thereby; but

I claim, broadly- 1. In arch construction, apair of cross supportingmembers, inwardly-extending flanges on the lower edges of said members,secondary members hung lengthwise between said cross supporting membersby means of lateral flanges engaging the llanges of said crosssupporting members and a covering of refractory material hung from saidsecondary members.

2. In arch construction, a pair of parallel cross supporting members,inwardly-extending flanges on the lower edges of said cross supportingmembers, I-beam sections hung lengthwise from said inwardly extendingflanges by means of the top flanges of said sections and units ofrefractory material hung from the lower flanges of said I-beam sections.

3. In arch construction, a pair of cross supporting members, sections ofI-beams hung lengthwise between said cross supporting members by meansof their top flanges, upwardly-extending lips on the lower flanges ofsaid I-beam sections and units of refractory material adapted to be hungfrom said I-beam sections and recessed to engage said lower flanges andsaid lips.

4. In arch construction, flanged cross supporting members, I beamsections hung lengthwise by means of their upper flanges between saidcross supporting members, upwardly-extending lips on the lower flangesof said I-beam sections, units of refractory material hung from eitherlower flange of said I-beam section and provided with L-shaped recessesadapted to engage'the lower flange and lip.

Signed at Pittsburg, Pennsylvania, this 3d day of May, 1904.

GEORGE L. JUNGE.

Witnesses:

EDWARD A. LAWRENCE, SUZANNE S. BEATTY.

